AGILE AV dsp amp, Руководство пользователя

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User manual version 1
AV dsp amp
Hardware Architecture
The standard version of the AV dsp amp has a stereo analogue audio input. This
analogue signal is converted to digital, processed by the DSP and then
converted back to analogue. A microcontroller controls the DSP, reads the
control panel and communicates with the PC and/or another AV dsp amp that may be
attached.
Digital audio input
The optional digital input board plugs into the main PCB and carries two RCA
connectors, SPDIF in and SPDIF through. Incoming SPDIF is linked through
directly to the output and sent to the DSP through an asynchronous sample rate
converter (ASRC) for jitter removal. The USB part adds a hub and an audio device
which in turn also transmits audio over the ASRC to the DSP. The ASRC chip scans
its input for whichever signal is active. In a stereo setup and in digital mode
the SPDIF through cable doubles as a master/slave link, obviating the need for
the mini jack cable. The mini jack cable remains functional though and does not
have to be removed.
Audio performance data
MBW=20kHz, unless otherwise noted. All filters set to unity. Noise levels
unweighted.
Item Symbo
l Mi
n Typ Max Unit Notes
Input level Vin 2.2 V
Input impedance 10k Ohm Analogue cinch
inputs
Output level LS1 100 W Into 4 Ohms
LS2 100 W Into 4 Ohms
Signal/Noise SNR 100 dB ADC
104 dB DAC
Total harmonic
disNoise THD+N TBD
Analogue sampling rate Fs 48 kHz
Delay per channel 0 0 340,
3 cm Set in software,
not for subout
channel
0 0 1000 us
Supported digital
sampling rates Fs 32, 44.1, 48,
88.2, 96, 192 kHz All input rates
converted to 48kHz
Gain 20 dB volume at 0dB
Remote control
The master unit is fitted with small control panel which is placed on the front
of AV dsp amp. Volume and standby/on is controlled by the pushbuttons and by a
infrared remote control. When 2 AV dsp amp modules are used only
one
control
panel is needed, because the trigger communication between master and slave.
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